Improved process for preparing stuffing for currying



UNITED STATES PATENT o. L. MoEEHoUsE, E oLEvELAND, OHIO, ASSIGNOR T0 HIMsELE AND J. B.

MEEEIAM, 0 sAME PLACE.

IMPROVED PROCESS FOR PREPARING STUFFlNG FOR CURRYING.

Specification forming part of Letters Patent No. 55,426, dated June 5, 1866.

To all whom it may concern:

Be it known that I, O. L. MOREHOUSE, of Cleveland, in the county of Guyahoga and State of Ohio, have invented new and useful 1mprovements in Making or Preparing Stuffing for Leather to be used in the Process of Currying, and for similar purposes; and I do hereby declare that the following is a full and complete description of the ingredients used and the mode of compounding the same.

Myinvention consists in a peculiar mode or process of purifying coal-oil, or oils containing paraffine, by means of a blast of air in divided jets, for agitating the mass of oil While treating the same with sulphuric acid, followed by the use of hot water in washing the oil, the use of soda or other alkalies to neutralize the trace of acid not washed out, and the use of a blast of ice'cold air in numerous jets for crystallizing the paraffine.

I11 the application of my process I take common coal-oil or mineral oil distilled from coal or coal-tar, or paraffine-oil from any other source. The oil may be derived from the residuum or caput mortmtm of the distillation of petroleum. In this case I distill by very hot fire, and thus obtain a rough paraffiue-oil of about 28 or 30 Baum.

The oil should be heated orsteamed to Fahrenheit, and then placed or pumped into a tank with an air-pipe coiled or crossed over the bottom, and perforated with numerous holes for jets of air. In winter or cool weather, the temperature of the oil must be raised to before putting into the tank.

To one barrel of forty gallons I add one pound of sulphuric acid; but usually I operate upon thirty barrels or more, adding thirty pounds of sulphuric acid. As the acid is added tothe oil a blast of air at common temperature is sent up from the bottom of the tank in numerous jets, thus thoroughly agitating the Whole mass of the oil and mixing the same with the acid. This agitation is continued, say, fifteen minutes. The cool air checks the chem ical temperature and carries off the excess of heat generated by the action of the acid upon the oil. This is a very important step in treating large quantities of oil. Then the tank is left at rest for about half an hour, when the acid and water which have settled to the bottom are drawn off. Now a very large amount of sulphuric acid is added to the oilsay half a pound of acid to a gallon of oil, or six hundred pounds to thirty barrels of oil-and the agitation is continued about one hour, when the tank is again left at rest and the acid and sediment drawn off from the bot-tom of the tank until a clear red oil begins to flow. This red oil remaining in the tank is now run into a clean tank containing hot water of the temperature of 120 or Fahrenheit, according to the weather, (in summer or winter,) and the whole agitated by the air-blast in jets for, say, fifteen minutes. About ten gallons of water are used for a barrel of oil or ten barrels of water for thirty barrels of oil in my large laboratory. After the agitation the whole is left a rest for half an hour to an hour, (or it may be better to rest ten hours,) and then the acid and sediment drawn off from the bottom until a clear amber oil begins to flow. This washing is repeated with the same quantities and temperature, agitation, rest, and drawing off until the oil runs clear again, and, if necessary, wash the third time. Then I add to the oil a solution of caustic soda, of the specific gravity of about 28, heated to 100 Fahr enheit, and agitate as before with ablast of common air-say fifteen minutes-and after one hours rest draw off the soda solution clean from the bottom of the tank. Now I add oil of lavender-say four to six ounces to the barrel of paraffine-oi.l-and agitate five or more minutes, when the oil may be heated by close steam in a lead vat in order to throw down the trace of soda solution yet remaining.

For the purpose of removing the paraffine the oil is exposed to cold, either in an ice-house, or I prefer in a practical way a blast of air from the ice-house passed in jets in the bottom of a tank. \Vhen the paraffine and stearine are crystallized or congealed they may be separated from the oil by straining through bags of Canton flannel or other suitable material.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. The above-described mode or process of clarifying parafiine-oil by the use of a blast of air in jets, for agitating the oil while treating the same with a large proportion of sulphuric chamber for erystallizing the paraffine, subacid, thus checking the excess of chemical stantiallyas set forth.

heat, substantially as set forth. 4

2. The use of hot water in washing the oil, MOREHOUSE' substantially in the manner and for the pux l \Vituesses: poses set forth. W. H. BURRIDGE,

3. The use of a blast of air from the ice- I A. WV. MOOLELLAND. 

